PETE BANNAN-DIGITAL FIRST MEDIA Roland Alberg, center, celebrates his three goal game with teammates, Fabian Herbers , left and Chris Pontius in the Union's 4-3 victory over the Chicago Fire at Talen Energy stadium in Chester Wednesday June 22, 2016. It was the first Union hat trick since April 10, 2010.

PETE BANNAN-DIGITAL FIRST MEDIA Roland Alberg, shoots a pently kick, scoring his third goal in the Union's 4-3 victory over the Chicago Fire at Talen Energy stadium in Chester Wednesday June 22, 2016. It ews the first Union hat trick since April 10, 2010.

PETE BANNAN-DIGITAL FIRST MEDIA The Philadelphia Union's Fabian Herbers keeps the ball away from the Chicago Fire's Eric Gehrig in the first half of the Union's 4-3 victory at Talen Energy Stadium June 22, 2016.

PETE BANNAN-DIGITAL FIRST MEDIA Roland Alberg, center, celebrates his second goal in the Union's 4-3 victory over the Chicago Fire at Talen Energy stadium in Chester Wednesday June 22, 2016. Alberg went on to score three.

PHOTOS: Philadelphia Union extinguish Chicago Fire

Roland Alberg notched a hat trick (with an asterisk), becoming the second Union player in history to score three goals in a game as the Union extinguished the Chicago Fire’s late charge, 4-3, at Talen Energy Stadium.